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Enterococcus silesiacus sp. nov. and Enterococcus termitis sp. nov.
Pavel Švec1, Marc Vancanneyt2, Ivo Sedláček1
1Czech Collection of Microorganisms, Faculty of Science, Masaryk University, Tvrdého 14, 602 00 Brno, Czech Republic.
Summary
Researchers identified two new species of enterococci from water and termite gut samples. These novel bacteria, Enterococcus silesiacus and Enterococcus termitis, were distinguished using genetic and phenotypic analyses.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- Enterococci are bacteria found in various environments, including water and animal guts.
- Accurate species identification is crucial for understanding microbial ecology and potential health implications.
Purpose of the Study:
- To characterize and classify three enterococcal isolates from water and a termite gut.
- To determine if these isolates represent novel species within the Enterococcus genus.
Main Methods:
- Numerical analysis of (GTG)5-PCR fingerprints.
- 16S rRNA gene sequencing.
- Housekeeping gene (pheS) sequencing.
- Whole-cell-protein analysis.
- DNA-DNA hybridization.
- Phenotypic feature analysis.
Main Results:
- Water isolates (W213 and W442T) and a termite gut isolate (LMG 8895T) showed distinct genetic profiles.
- 16S rRNA gene sequencing placed all strains within the Enterococcus faecalis group.
- Further genetic and protein analyses confirmed distinct positions for the water and termite isolates.
- DNA-DNA hybridization and phenotypic data supported the designation of two novel species.
Conclusions:
- The water isolates W213 and W442T are proposed as the novel species Enterococcus silesiacus sp. nov.
- The termite gut isolate LMG 8895T is proposed as the novel species Enterococcus termitis sp. nov.
- These findings expand the known diversity of the Enterococcus genus.